On Monday 30 March 2009, Sergei Shtylyov wrote: > > That's a third what an ATA drive gives on the same system; the > > CF cards do not support DMA access modes. > > Those CF cards probably don't even support PIO3/4 because using DMA ATA > drive's speed whould've been order of magnitude better than 4.5 MB/sec (which > should correspond to PIO4).
I'm not sure that the the IDE controller (Palmchip BK3710) supports transfers that fast even when using DMA. Taking a laptop drive and hooking it up to the IDE link gave lower throughput (much lower!) than the laptop had. It's either the controller or its driver which is the bottleneck. > > +config MACH_DAVINCI_EVM_CF > > + bool "Use CompactFlash, not IDE drive" > > + depends on MACH_DAVINCI_EVM && BLK_DEV_PALMCHIP_BK3710 > > I was thinking of making this a choice instead. And I don't see why it > should depend on BLK_DEV_PALMCHIP_BK3710. There's no point in offering the choice if its IDE driver isn't configured. _______________________________________________ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
